I treated the guanidine gum solution with CPAM, why is the COD removal rate negative, does anyone kn

In general, the high COD concentration in the sewage treatment industry is a difficult problem to solve, not only the process, but also the most important thing is the water purifier, a good water purifier can often achieve twice the result with half the effort. The inorganic and organic components in the water purification agent are covalently bonded, which has the advantages of inorganic flocculant and organic polymer flocculant, and has good stability, which can not only remove colloidal particles in water (such as turbidity, organic matter, bacteria, viruses, etc.) in water and sewage, phosphorus, fluorine, arsenic, etc., but also efficiently remove dissolved pollutants with a molecular weight of less than 500 (such as diclofenac, niflinamic acid, PFOA, etc.) that are difficult to remove by traditional physicochemical treatment. The water purification agent has a wide range of optimal dosing and good turbidity and decolorization effect, and can be widely used in the process of turbidity, decolorization, solid-liquid separation and other processes in water purification and wastewater treatment, especially for high-concentration COD wastewater.

Kechuang water purifier has a strong electric neutralization ability, which is conducive to adsorbing charged particles in water, so that the particles can be condensed into large particles and precipitated. The long-chain characteristics of Kechuang composite water purifier are conducive to the bridging adsorption of colloidal particles to achieve the cohesion of particles, which greatly improves the water purification capacity and has a fast and efficient flocculation effect.

Kechuang water purifier is mainly used in the coagulation method of chemical method to remove high concentration of COD, which can generally be treated below 50mg L. koejsj has detailed information on it.

The COD removal rate you said is negative, it may be that there is a problem with the water purifier you are using, and it cannot meet the purpose of removal.

I don't quite understand what it means to deal with guar solution. Is it oilfield wastewater?

COD can be considered to include the solid state and dissolved state of particles, and the removal rate is the ratio of COD of treated effluent water to COD of raw water. Just take it literally.

COD or CODCR (Chemical Oxygen Demand).

Concept: Under acidic conditions, the oxygen consumed by oxidizing organic matter into CO2 and H2O with a strong oxidant (potassium dichromate used in China).

Calculation of COD removal rate.

The pre- and post-treatment CODs were counted as COD0 and COD1, respectively, and the COD removal rate was calculated as follows:

COD removal rate = ((cod0-cod1) cod0) 100%.

Generally, potassium dichromate is used to measure COD

The algorithm is as follows: codcr=(v0-v1) c 8 1000 V formula C - the concentration of ammonium ferrous sulfate standard solution, mol l v - water sample volume, ml

V0 - the amount of ammonium ferrous sulfate standard solution when titrating blank, MLv1 - the amount of ammonium ferrous sulfate standard solution when titrating water sample, ML8 - oxy (1 2) molar mass, g mol

Total removal rate = (total amount at COD inlet - total amount at COD outlet) Total amount at COD inlet.

Chemical Oxygen Demand (COD) is a chemical measurement of the amount of reducing substances in a water sample that needs to be oxidized. Oxygen equivalent of substances that can be oxidized by strong oxidants in wastewater and wastewater treatment plant effluent and contaminated water.

In the study of river pollution and the properties of industrial wastewater, as well as in the operation and management of wastewater treatment plants, the organic pollution parameters that can be determined relatively quickly are represented by the symbol COD. The oxidants used to measure chemical oxygen demand are potassium permanganate or potassium dichromate. The values obtained with different oxidants are also different, so it is necessary to indicate the detection method.

I also read the relevant information, the removal rate of the primary sedimentation tank to the BOD is indeed about 20%, but there is a conceptual problem here: the removed BOD refers to the organic matter that can be biodegraded in the SS, that is to say, the removal of the BOD is removed by the precipitation of the part of the SS that can be oxidized and decomposed by biological oxidation. In the case of inorganic SS, there will be no removal of BOD in the primary sedimentation tank.

In addition, the removal rate of the SS in the primary sedimentation tank is about 40% to 50%, which is a mistake for me in the morning.

SS 50-60% BOD5 25-35%, simple precipitation can fully achieve the influent index.

The initial sedimentation is dominated by settleable particulate matter, and the COD does not change much.

What system do you mean is meaningless?

The removal rate of COD refers to the ratio of the remaining COD to the COD before entering a certain equipment or a certain process structure in a process after the sewage has been treated by it, so if the removal rate is lower than 50% in the whole process, the system is obviously a failure, and if it is for a device, maybe the removal rate is 0%, because it removes SS or other indicators or something, which is also meaningful!

COD refers to the chemical degradation of organic matter, including organic biodegradation of BOD, B C is a reference index of biochemistry, generally lower than the biodegradability is relatively poor, the use of hydrolysis to improve the B C ratio. As for the COD removal rate that you said can also reach 70-80%, it means that after hydrolysis, B C is increased to at least that digital, it can't be that high, and it's very good if there is. According to my experience, printing and dyeing wastewater is pre-dosed, generally with PAC pam for coagulation and precipitation treatment, the pretreatment can also reduce part of the COD physicochemically, so your statement is too data-based, and the actual situation should be taken into account.

Are you just removing BODs?

BOD30 COD100 COD removed 70 80% has a dime relationship with B C?

Air flotation tank: depending on which stage it is used, if it is used behind biochemistry, then there is basically no removal rate for COD BOD, and the general writing can be written according to 5%-10%;

If you want to use air flotation in the pre-treatment process of papermaking wastewater, then the BOD Cod SS can achieve a removal rate of more than 60% (I have done 70% removal rate).

The removal rate of air flotation mainly depends on the water quality, the type of agent added, etc.

What does that mean to be clear? Interested in your question!

Microelectrolysis pretreatment can be followed by biochemical treatment.

This problem has been encountered by our company before, and we are asking a professional water treatment company, which seems to be Jin Dayang Environmental Protection Technology****.

Business scope: sewage treatment, reclaimed water reuse, industrial wastewater treatment, domestic sewage treatment, reclaimed water reuse, municipal sewage treatment, urban sewage treatment, rural sewage treatment, oil-water separation, building water supply, etc.

Hope it helps.

Hehe, you still lack a known condition for collapse, water ingress COD

For example, the COD of the inlet water is 500mg L

Influent COD * Total Water Amount * Removal Rate = How many kilograms are removed per day.

Among them, the unit can be carefully converted to answer the defeat town